L85.9 — Epidermal thickening, unspecified
L85.9 is a billable, specific ICD-10-CM code for epidermal thickening, unspecified. It is valid for submission on a claim.
Other codes that can never be billed with L85.9
These codes carry an Excludes1 note pointing at L85.9. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading L85.9 alone.
- R23.4Changes in skin texture
Risk adjustment
L85.9 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
L85.9 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A57161Billing and Coding: Benign Skin Lesion Removal (Excludes Actinic Keratosis, and Mohs)
How L85.9 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to L85.9.
- Hyperkeratosis
- Pachyderma, pachydermia
- Hyperplasia, hyperplastic›epithelial
- Thickening›epidermal
- Hyperplasia, hyperplastic›epithelial›skin
Related codes at this level
Codes that share L85. If L85.9 is not quite right, the correct code is usually one of these.
Questions about L85.9
- Is L85.9 a billable ICD-10-CM code?
- Yes. L85.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does L85.9 sit in the tabular list?
- Diseases of the skin and subcutaneous tissue (L00-L99), in the block Other disorders of the skin and subcutaneous tissue (L80-L99).